Ctjrtain-pixtttee



UNITED STATES PATENT OFFICE.

DON CARLOS SMART, OF CAMBRIDGEPORT, MASSACHUSETTS.

Specication of Letters Patent No. 11,683, dated September 12, 1854.

To all 'whom 25 may concern.'

Be it known that I, DON CARLos SMART, of Cambridgeport, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in VVindow-Shade Fixtures; and I do hereby declare that the same is fully described and represented in the following specification and the accompanying drawings, letters, figures, and references thereof.

Of the said drawings, Figure l, denotes an elevation of a curtain fixture, having my improvement applied to it and arranged between portions of the frame of a window. Fig. 2, is a longitudinal section of the same.

A, in said drawings represents a curtain roller placed between the two side bars B, C, of a window frame. E, is a grooved pulley of said roller on which the winding up cord, D, is wound. From the middle of the outer end of this pulley a metallic, male conical center, F, is made to extend. The other end of the curtain roller is represented with a head or disk G, and is made with a female screw H, formed longitudinally in it and so as to receive a male screw, I, from which projects a conical male screw center as seen at K.; the said male screw being provided with a circular disk or head, L, for the purpose of enabling it to be turned or revolved by means of the hand of a person when applied to such head.

In putting up this curtain roller, it is first placed between the sides of the window frame and the curtain adjusted so as to hang in a proper posit-ion. This done, the male screw is rotated or turned so as to unscrew it from the female screw and thereby force the two male centers into the wood or sides of the window frame so as to form bearings or sockets for them to rest and revolve in. The male screw should be made to fit closely into the female screw so that it may not be revolved therein during the winding or unwinding of the window shade.

I am aware that a center pin inserted in a socket made in the end of a roller, and resting against a coiled spring placed in said socket has been employed in curtain fixtures. I therefore do not claim such, nor is it to be considered in any respect as a contrivance equivalent or analogous to my invention either in construction or operation; for with my improvement applied to a curtain roller I am enabled to dispense with a balancing Vweight to the curtain and to obtain any amount of friction on the centers or bearings that may be necessary to overcome the weight of the curtain and sustain it at any desirable height or position between the limits of its movements. I am also enabled by means of. my improvement to dispense with the usual socket pieces or bearings for the journals that become necessary in other fixtures for curtain rollers and particularly where one of the journals is made movable against a spring as above set forth: therefore What I claim as my improvement is- The combining the center pin of the curtain roller with the roller by means -of a screw and making the pin with a head by which it may be revolved, the same enabling me not only to dispense with Athe usual counterbalancing weight necessary for the win dow shade or curtain, but to form in the window frame the female centers or bearing holes by the pressure of the screw and thereby I dispense with the usual socket pieces generally applied to the window frame for supporting the roller, the whole being essentially as hereinbefore specified.

In testimony whereof I have hereunto set my signature this twenty-eighth day of Feb-V ruary A. D. 1854.

D. C. SMART.

Witnesses:

GEO. W. LIVERMORE, I. F. LIVERMORE. 

